Finding the Fourth Proportional to 147.70, 203.80 and 84.68
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Solution
The fourth proportional to 147.70, 203.80 and 84.68 is: 116.84
Step by Step Solution
- Step 1: Write the proportion equation
147.70 : 203.80 = 84.68 : x - Step 2: Convert to fraction form
147.70/203.80 = 84.68/x - Step 3: Cross multiply
147.70x = 203.80 × 84.68 - Step 4: Simplify right side
147.70x = 17,257.78 - Step 5: Solve for x
x = 17,257.78/147.70 - Step 6: Final answer
x = 116.84
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.